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@INPROCEEDINGS{Thaler:850108,
author = {Thaler, Florian and Udomsilp, David and Schafbauer,
Wolfgang and Bischof, Cornelia and Fukuyama, Yosuke and
Miura, Yohei and Kawabuchi, Mair and Taniguchi, Shunsuke and
Takemiya, Satoshi and Opitz, Alexander Karl and Bram,
Martin},
title = {{R}edox {C}ycling of {N}i/{YSZ} and {N}i/{GDC} {A}nodes for
{M}etal-{S}upported {F}uel {C}ells},
reportid = {FZJ-2018-04187},
year = {2018},
abstract = {Metal-supported fuel cells (MSCs) are promising candidates
for non-stationary applications like auxiliary power units
or range extenders in battery electric vehicles. They are
attractive due to their potential to withstand fast thermal
cycles and vibrations during cell operation. In addition,
they have to withstand redox cycles, which might occur
during start-up and shut-down of the fuel cell stack.
Recently, a novel nickel/gadolinium doped ceria anode
(Ni/GDC) was introduced in the metal-supported fuel cell
concept of Plansee SE which almost tripled current density
compared to the standard cell concept with a Ni/YSZ anode.
In the present work, both cell concepts were compared
regarding their ability to withstand harsh redox cycles.
Therefore, after initial check at 750 °C, cell performance
of button cells after controlled redox cycles was
investigated at different temperature steps respectively.
Re-oxidation temperature of the anodes was varied between
300 and 700 °C for 10 min in air. Afterwards, reduction of
the anode was conducted by purging anode side with N2 for 10
min and then going back to standard cell operation
conditions with H2 supply. The response of cell performance
on redox cycling was recorded continuously. While standard
MSCs with Ni/YSZ anode showed a strong degradation after a
few cycles if the oxidation was conducted at temperatures
above 600 °C, novel MSCs with Ni/GDC anode showed a
remarkable resistance against re-oxidation. For a deeper
understanding of this behavior, microstructural
investigation of the Ni/GDC anode and the adjacent
electrolyte was performed within the tested cells by FE-SEM
and FIB-SEM 3D structure analysis. Furthermore,
electrochemical behavior of Ni/GDC anode was investigated at
a larger cycle number of up to 50 redox cycles with 2 h air
supply each.},
month = {Jul},
date = {2018-07-03},
organization = {13th European SOFC $\&$ SOE Forum
2018, Lucerne (Switzerland), 3 Jul 2018
- 6 Jul 2018},
subtyp = {After Call},
cin = {IEK-1},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {135 - Fuel Cells (POF3-135) / SOFC - Solid Oxide Fuel Cell
(SOFC-20140602)},
pid = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/850108},
}